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| Titel |
Planning method and application case of check dams in a small-scale watershed |
| VerfasserIn |
Jiangang Chen, Xiaoqing Chen, Yong You, Wanyu Zhao |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250142290
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| Publikation (Nr.) |
 EGU/EGU2017-5891.pdf |
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| Zusammenfassung |
| Check dams are transverse structures build across gullies and they are very important
engineering measure in soil restoration hazard mitigation. After the Wenchuan earthquake in
China, a numerous of flood and debris flow was trigged, some of them caused serious
secondary disasters. To solve this problem, a debris-flow prevention method by controlling
debris-flow magnitude and avoiding blocking river was proposed, it can effectively prevent
secondary disasters and control unconsolidated soil supply and debris-flow movement from
upstream to downstream. Based on this method, a series of new types of check dams are
proposed, the regulation effect on sediment particle size of slot check dam was qualitative
analyzed, and the design parameters of the check dam are deduced, such as deposition slope,
deposition length, and dam height. An engineering application case was given in
Xiaogangjian Gully, which is in Wenchuan earthquake area, the proposed watershed
planning method and a series of check dams with different orifices sizes are used.
The engineering application experience may provide a useful way for developing
check-dams as restoration tools and hazard mitigation methods at watershed scale. |
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